From db831ebee07dfbff2b48c5cf0a518380545b84d7 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 11 Feb 2026 17:37:09 -0600
Subject: [PATCH] Fix clang-tidy: use const auto& for arg() return value

On Arduino, arg() returns const String&, so auto copies unnecessarily.
const auto& binds to the reference on Arduino and extends the temporary
lifetime on IDF.
---
 esphome/components/web_server/web_server.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/esphome/components/web_server/web_server.h b/esphome/components/web_server/web_server.h
index 081bf75aa7..c5e4c04f6f 100644
--- a/esphome/components/web_server/web_server.h
+++ b/esphome/components/web_server/web_server.h
@@ -574,7 +574,7 @@ class WebServer : public Controller,
   template<typename T, typename Ret>
   void parse_bool_param_(AsyncWebServerRequest *request, ParamNameType param_name, T &call, Ret (T::*setter)(bool)) {
     if (request->hasArg(param_name)) {
-      auto param_value = request->arg(param_name);
+      const auto &param_value = request->arg(param_name);
       // First check on/off (default), then true/false (custom)
       auto val = parse_on_off(param_value.c_str());
       if (val == PARSE_NONE) {